#! /usr/bin/python

## @file
# This file is part of scons-tools.
#
# @author Carsten Uphoff <c.uphoff@tum.de>
#
# @copyright Copyright (c) 2019, Technische Universitaet Muenchen.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
#    this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright notice,
#    this list of conditions and the following disclaimer in the documentation
#    and/or other materials provided with the distribution.
#
# 3. Neither the name of the copyright holder nor the names of its
#    contributors may be used to endorse or promote products derived from this
#    software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.

import utils.checks
import utils.pkgconfig

def find(env, required=True):
  conf = env.Configure()
  utils.checks.addDefaultTests(conf)

  flags = utils.pkgconfig.parse(conf, 'eigen3', ['--cflags'])

  if flags:
    utils.pkgconfig.appendPathes(env, flags)

  if not conf.CheckHeader('Eigen/Eigen', language='c++'):
    if required:
      utils.checks.error('Could not find eigen3')
      env.Exit(1)
    else:
      conf.Finish()
      return False

  env.Append(CPPDEFINES=['-DHAS_EIGEN3'])

  conf.Finish()
  return True
